Na2CO3-doped CaO-based high-temperature CO2 sorbent and its sorption kinetics

被引：65

作者：

Lee, Chan Hyun ^{[1
,4
]}

Choi, Seung Wan ^{[1
]}

Yoon, Hyung Jin ^{[1
]}

Kwon, Hyuk Jae ^{[2
]}

Lee, Hyun Chul ^{[2
]}

Jeon, Sang Goo ^{[3
]}

Lee, Ki Bong ^{[1
]}

机构：

[1] Korea Univ, Dept Chem & Biol Engn, 145 Anam Ro, Seoul 02841, South Korea

[2] Samsung Elect Co Ltd, Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, Gyeonggi Do, South Korea

[3] Korea Inst Energy Res, Biomass & Wastes Energy Lab, 152 Gajeong Ro, Daejeon 34129, South Korea

[4] Korea Inst Sci & Technol, Fuel Cell Res Ctr, 5 Hwarang Ro 14 Gil, Seoul 02792, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2018年 / 352卷

基金：

新加坡国家研究基金会;

关键词：

Carbon dioxide; Sorption; CaO-based sorbent; Sodium carbonate; Sorption kinetics; PURITY HYDROGEN-PRODUCTION; GAS SHIFT REACTION; CARBON-DIOXIDE CAPTURE; MG DOUBLE SALT; K2CO3-PROMOTED HYDROTALCITE; CALCINATION; PARTICLES; METHANE; ADSORPTION; CAPACITY;

D O I：

10.1016/j.cej.2018.06.141

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

CaO-based sorbents have received much research attention for high-temperature CO2 capture because of their high theoretical sorption capacities. However, harsh conditions are needed to regenerate CaO-based sorbents, and their high CO2 sorption capacities diminish significantly in cyclic sorption procedures owing to thermal sintering effects. To solve these problems, dopant components have been applied to CaO-based sorbents. In this study, a new CaO-based sorbent containing Na2CO3 was synthesized using a precipitation method. The prepared sorbent (Na2CO3-CaO) was characterized using various analytic methods, and its CO2 sorption performance was studied using thermogravimetric analysis. Na2CO3-CaO showed high CO2 affinity above 600 degrees C, and its sorption/regeneration kinetics were faster than those of the conventional CaO sorbent. To investigate the CO 2 sorption mechanism onto Na2CO3-CaO, the change in crystalline structure with respect to temperature was analyzed using in-situ X-ray diffraction; the results revealed that the double salt Na2Ca(CO3)(2) was generated from the reaction of CO2 with CaO and Na2CO3. Kinetic models were also developed to describe the CO2 sorption behavior of Na2CO3-CaO. The results of this study advance our understanding of the effect of alkali metal carbonates on CaO-based sorbents.

引用

页码：103 / 109

页数：7

共 41 条

[1] Development of Potassium- and Sodium-Promoted CaO Adsorbents for CO2 Capture at High Temperatures [J].

Al-Mamoori, Ahmed ;

Thakkar, Harshul ;

Li, Xin ;

Rownaghi, Ali A. ;

Rezaei, Fateme .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2017, 56 (29) :8292-8300

[2]

[Anonymous], 2012, WORLD EN OUTL 2012

[3] EFFECT OF THE PRODUCT LAYER ON THE KINETICS OF THE CO2-LIME REACTION [J].

BHATIA, SK ;

PERLMUTTER, DD .

AICHE JOURNAL, 1983, 29 (01) :79-86

[4] CALCINATION KINETICS AND SURFACE-AREA OF DISPERSED LIMESTONE PARTICLES [J].

BORGWARDT, RH .

AICHE JOURNAL, 1985, 31 (01) :103-111

[5] Diffusion-controlled solid-state reactions of spherical particles, a general model for multiphase binary systems [J].

Buscaglia, V ;

Milanese, C .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (39) :18475-18482

[6] Adsorbent Materials for Carbon Dioxide Capture from Large Anthropogenic Point Sources [J].

Choi, Sunho ;

Drese, Jeffrey H. ;

Jones, Christopher W. .

CHEMSUSCHEM, 2009, 2 (09) :796-854

[7] Adsorption-enhanced steam-methane reforming [J].

Ding, Y ;

Alpay, E .

CHEMICAL ENGINEERING SCIENCE, 2000, 55 (18) :3929-3940

[8] ab initio Thermodynamic Study of the CO2 Capture Properties of M2CO3 (M = Na, K)- and CaCO3-Promoted MgO Sorbents Towards Forming Double Salts [J].

Duan, Yuhua ;

Zhang, Keling ;

Li, Xiaohong S. ;

King, David L. ;

Li, Bingyun ;

Zhao, Lifeng ;

Xiao, Yunhan .

AEROSOL AND AIR QUALITY RESEARCH, 2014, 14 (02) :470-479

[9] CO2 capture capacity of CaO in long series of carbonation/calcination cycles [J].

Grasa, Gemma S. ;

Abanades, J. Carlos .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2006, 45 (26) :8846-8851

[10] Chemical-looping combustion (CLC) for inherent CO2 separations-a review [J].

Hossain, Mohammad M. ;

de lasa, Hugo I. .

CHEMICAL ENGINEERING SCIENCE, 2008, 63 (18) :4433-4451

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